IFB(4) - Device Drivers Manual (sparc64) #

IFB(4) - Device Drivers Manual (sparc64)

NAME #

ifb - inextricable frame buffer

SYNOPSIS #

ifb* at pci? wsdisplay* at ifb?

DESCRIPTION #

The ifb driver attempts to support various frame buffer cards based on the 3DLabs ‘Wildcat’ chips, such as the Sun Expert3D-Lite, Expert3D, XVR-500, XVR-600 and XVR-1200 boards. It does not provide direct device driver entry points but makes its functions available via the internal wsdisplay(4) interface.

DISPLAY RESOLUTION #

If the ifb frame buffer is used as the console display, a different resolution than the default 1152x900 can be selected by changing the OpenPROM environment. To change the default resolution, type the following:

  ok setenv output-device screen:r1280x1024x76

to change to a 76Hz 1280x1024 resolution.

The ifb frame buffer accepts the following resolutions:

**Mode**           **Resolution** **Refresh**   
**Identifier**                   **Rate (Hz)**   
`r640x480x60`      640x480       60            
`r640x480x60i`     640x480       60          Composite sync  
`r768x575x50i`     768x575       50            
`r1024x768x60`     1024x768      60          Composite sync  
`r1024x768x70`     1024x768      70            
`r1024x768x75`     1024x768      75            
`r1024x768x77`     1024x768      77            
`r1024x800x84`     1024x800      84          Composite sync  
`r1152x900x66`     1152x900      66          Composite sync  
`r1152x900x76`     1152x900      76          Composite sync  
`r1280x800x76`     1280x1024     76            
`r1280x1024x60`    1280x1024     60            
`r1280x1024x67`    1280x1024     67          Composite sync  
`r1280x1024x75`    1280x1024     75            
`r1280x1024x76`    1280x1024     76          Composite sync  
`r1280x1024x85`    1280x1024     85            
`r1440x900x76`     1440x900      76          Composite sync  
`r1600x1000x66`    1600x1000     66            
`r1600x1000x76`    1600x1000     76          Composite sync  
`r1600x1280x76`    1600x1280     76            
`r1792x1344x75`    1792x1344     75            
`r1920x1080x72`    1920x1080     72          Composite sync  
`r1920x1200x70`    1920x1200     70            
`r1920x1200x75`    1920x1200     75          

Modes with the suffix letter ‘i’ are interlaced.

SEE ALSO #

intro(4), pci(4), wscons(4), wsdisplay(4)

BUGS #

The second head of XVR-1200 cards is not supported.

OpenBSD 7.5 - September 3, 2011